Lonkero,

I don't think either space or tab are the real issue. The issue as you say is the FONT and the program which the user is using. Different programs use different TAB spacing which can be a problem for everyone.

Example: You have MyEditor which has spacing of 8 for TAB and using Airel font. Then you send file to your buddy who has editor ThereEditor which has spacing of 4 for TAB and is also using Airel

The same document will look different to both of you.

At least that is how I view the issue with SPACE/TAB